Unit 1: Computer Systems + Ch 2

1

Ibrahim is learning about data transmission within a computer. He knows that the system bus consists of three separate buses. What are they?

A Data Bus, Address Bus, Control Bus B Data Bus, Power Bus, Control Bus C Address Bus, Memory Bus, I/O Bus D Control Bus, Input Bus, Output Bus

2

An I-P-O chart is primarily used to:

A Write the actual program code B Visualize the flow of data through a system C Test the final software product D Debug syntax errors

3

Bilal is designing a system to predict the weather. He simplifies the problem by focusing on temperature, pressure, and humidity. What principle is this?

A Decomposition B Abstraction C Pattern recognition D Algorithm design

4

Zayed is creating a program to calculate the total cost of items in a shopping cart. He needs to sum the prices. This is part of the:

A Input B Processing C Output D IPO chart's output section

5

Which component is essential for data communication?

A Sender B Receiver C Transmission medium D All of these

6

Focusing on the essential details while ignoring irrelevant information is known as:

A Abstraction B Decomposition C Pattern Recognition D Algorithm

7

Sana is debugging a program and finds that it has an infinite loop. The computer stops responding. Which component of the computer system is primarily responsible for executing the loop instructions?

A Hard Drive B RAM C CPU D Motherboard

8

Layla is designing a system to assign grades based on scores. She sets ranges: 90+ is A, 80-89 is B, etc. This is an example of which problem-solving method?

A IPO model B Algorithm C Computational thinking D Decomposition

9

Which generation of computers introduced integrated circuits?

A First Generation B Second Generation C Third Generation D Fourth Generation

10

According to the Von Neumann architecture, a computer consists of a CPU, a memory unit, and I/O devices. Where are both program instructions and data stored?

A In separate memories B In a single, shared memory C Only within the CPU registers D On the input/output devices

11

Which of the following best defines an algorithm?

A A random solution B A clear and finite set of steps C An input device D A software error

12

Ahmed is designing a program that finds the minimum value in a list. He uses a loop to compare elements. This is:

A Input B Processing C Output D IPO chart input

13

Which of the following electronic components characterized the first generation of computers?

A Vacuum Tubes B Transistors C Integrated Circuits D Microprocessors

14

Amina is learning about the components of a computer system. She identifies the CPU as the brain. Which part of the CPU performs arithmetic and logic operations?

A Control Unit B ALU (Arithmetic Logic Unit) C Registers D Cache

15

In the hierarchy of computer memory, which of the following is the slowest but has the largest capacity?

A CPU Registers B Cache Memory C Main Memory (RAM) D Secondary Storage (HDD/SSD)

16

In problem solving, identifying inputs is important because:

A They are outputs B They affect processing C They are optional D They slow the system

17

Which is the first step in problem solving?

A Testing the solution B Understanding the problem C Writing code D Drawing charts

18

A step-by-step procedure for solving a problem or accomplishing a task is known as a(n):

A Flowchart B Pseudocode C Algorithm D I-P-O Chart

19

Ayesha is helping her teacher calculate the average marks of 30 students. She decides to sum all marks and then divide by 30. Based on the IPO model, what is the output?

A The list of student names B The sum of all marks C The average marks D The number of students

20

Who is known as the father of the computer?

A Alan Turing B Charles Babbage C John von Neumann D Bill Gates

21

Problem solving mainly involves:

A Guessing answers B Following random steps C Finding a systematic solution D Avoiding the problem

22

What is the primary purpose of the 'Input' stage in the I-P-O model?

A To display the final result B To provide the necessary data and instructions for the problem C To perform calculations on the data D To store the processed information permanently

23

Which principle of computational thinking involves focusing on the essential details while ignoring irrelevant information?

A Abstraction B Decomposition C Pattern Recognition D Algorithm Design

24

Lina is designing a system to find the shortest path between two cities on a map. She breaks the map into nodes and edges. What is she doing?

A Abstraction B Decomposition C Pattern recognition D Algorithm design

25

Sami is developing a program to calculate the area of a circle. He uses the formula πr². In the IPO chart, what is the processing?

A Reading r B Displaying the area C Applying the formula D Storing the value